But radiologist Dr Jesus Pablo Gil Muro, who has examined Roberto, threw the world record claims into doubt when he said the man refused to take off all the bandages and would not let him see the skin.

Dr Muro said: "When he came here to do a CT scan, my first impression was that it was a unique and unusual case. I had never seen a patient like Roberto.”

He said he had become suspicious, and conducted a CT scan, saying: "What the CT scan showed was that there is a very large foreskin. It goes just before the knee.